64948640

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4561}}^1$

素因数の和:4665

約数の個数: 48

約数和(自身を含む): 155199240

約数和(自身を除く): 90250600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1780, 2848, 3560, 4561, 7120, 9122, 14240, 18244, 22805, 36488, 45610, 72976, 91220, 145952, 182440, 364880, 405929, 729760, 811858, 1623716, 2029645, 3247432, 4059290, 6494864, 8118580, 12989728, 16237160, 32474320, 64948640]

約数ペア:

[(1, 64948640), (2, 32474320), (4, 16237160), (5, 12989728), (8, 8118580), (10, 6494864), (16, 4059290), (20, 3247432), (32, 2029645), (40, 1623716), (80, 811858), (89, 729760), (160, 405929), (178, 364880), (356, 182440), (445, 145952), (712, 91220), (890, 72976), (1424, 45610), (1780, 36488), (2848, 22805), (3560, 18244), (4561, 14240), (7120, 9122)]